Allen w



(No Model.)

' A. W. SWIFT.

LUBRIGATOR.

No. 272,793. Patented Feb. 20, 1883.

\ /'.TNESEEE INVENTUF QL mE' UNITED STATES PATENT @rrice.

ALLEN \V. SWIFT, OF ELMIRA, NEW YORK.

LUBRICATOR.

SPECIFICATION forming part of Letters Patent No. 272,793, dated February 20, 1883. Application filed October 21,1 82. N0 ma) To all whom it may concern:

Be it known that I, ALLEN W. SWIFT, of Elmira, in the county ofOhemung, in the State of New York, have invented new and useful Improvements in Lubricators, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

The object of this invention is to provide simple and effective means for lubricating steam-cylinders and their valve, especially those which are subjected to various steampressure, as is the case with the cylinders and valves of locomotives, where the application of steam is varied according to the power requiredto carry the engine over the various grades of the road, and in which the action of the valve is sometimes suddenly reversed while the engine is in motion. On such engines it has been found exceedingly difficult to lubricate the cylinder and valve when most neededi. 6., while the engineis running on an ascending grade and the valve at full strokeowing to the back-pressure of steam on the lubricator or lubricant-duct leading to the steamehest. The lubrication was therefore performed only when the engine was running on I adescending grade and the steam shut off from the cylinder; but when the engine is running in this condition a suction is produced on the lubricant-duct, which causes too rapid and excessive application of the lubricant to the valve and cylinder. The same result is produced when reversing the engine while in motion. All the aforesaid d-ifficulties are overcome in the simplest and most efl'ective manner by the novel construction and combination of the devices hereinafter described, and

phragm.

Similar letters of reference indicate corresponding parts.

B denotes the boiler of a locomotive, G the cylinder, and D the steam-chest inclosing the valve of the cylinder.

L represents a lubricating-cup of any desired or suitable form and construction. it being in this case shown in the form of a socalled displacement lubricator, which antomatically feeds the lubricant to the parts to be lubricated by condensed steam entering the cup and displacing a corresponding quantity of the lubricant, said luhricator being attached to and having its lubricant-duct communicating with a steam-pipe, (t, which is extended preferably from the front part of the boiler to the steam-chest D, as shown in Fig. 1 of the drawings. By means of a stop-cock, 1, con nected with the pipe at, the flow of steam through the same can be regulated, said pipe serving to conduct the lubricant to the steamchest. A small tube, 0, extended from the dome of the boiler to the usual condensingchamber,f, of the lubricat'or, supplies the req uisite steam for displacing the lubricant in the cup and forcing it into the pipe a which conveys it to the steam-chest, as aforesaid.

At a convenient point in the length of the pipe or, preferably at or near the steam-chest, I provide said pipe with ajoint and coupling, A, and between said joint I introduce a diaphragm or disk, D, which has a small aper-' ture', c, for the passage of the lubricant. The interposition of said disk in the steam-pipe a forms a contracted or choked. throat, which intercepts, to a great extent, the pressure of steam from either direction, and eq ualizes said pressure in the pipe a between the couplingA and lubricator L, and consequently equalizes also the flow of lubricant, which readily finds its way through the aperture 0 of the disk, and thence to the interior of the steam chest and cylinder. Even when the engine is running under a full head of steam the constant pressure of steam in the pipe at toward the steam-chest enables thelubricant to force its way through the partly-choked throat or aperture c of the disk b; and in case a vacuum is produced inthe cylinder by shutting off the ging of the lubricant-channel through the dia- I steam, or by reversing the engine while in 1110- tion,the disk arrests the rush ofsteam through the pipe to and maintains the steam at nearly or quite a uniform pressure in said pipe, and thus equalizes the flow of thelubricant under all circumstances. By placing the disk I) removably in the joint of the pipe a, as before described, I am enabled to use interchangeable disks, each having an aperture of a different size, according to the size of the pipe and the flow of the lubricant desired.

In order to guard against clogging of the aperture 0, I provide the sides of the disk I) with attenuated projections 61, through which is extended achannel coinciding with the apcrime 0, as illustrated in Fig. 4 of the draw ings.

Having described my invention, what I claim 1S-- l. The combination, with a steam-cylinder and its valve, ot'a steam-duct communicating therewith, and having a partly-choked throat, and a lubricantcup having its delivery connected with said duct at a point between the choked throat and steam-receiving end thereof, substantially as shown.

2. The combination, with a steam-cylinder and its valve, of a steam-duct having a partdischarge connected with said duct, the disk b, arranged within the duct a, and having the projections 01 and the channel 0, for the passage of the lubricant through said disk, substantially as described and shown, for the purpose specified.

In testimony whereofI have hereunto signed my name and aflixed my seal, in the presence of two attesting witnesses, at Syracuse, in the county of Onondaga, in the State ofNew York, this 9th day of October, 1882.

ALLEN W. SWIFT. [L. s.]

Witnesses WM. 0. RAYMOND, F. H. GIBBS. 

